Beginner S Guide To Kotlin Programming

This textbook assumes very little knowledge of programming so whether you have dabbled with a little JavaScript, played with a bit of Python, written Java or have virtually no programming experience at all you will find that it is for you. The first part of the book introduces Kotlin program structures as well as conditional flow of control features such as if and when expressions as well as iteration loops such as for, while and do-while. Subsequent chapters explain how functions are implemented in Kotlin and introduce concepts from functional programming such as higher order functions and curried functions. The second part focusses on object oriented programming techniques, these include classes, inheritance, abstraction and interfaces. The third part presents container data types such as Arrays, and collections including Lists, Sets and Maps and the fourth part considers concurrency and parallelism using Kotlin coroutines. The book concludes with an introduction to Android mobile application development using Kotlin. Clear steps are provided explaining how to set up your environment and get started writing your own Kotlin programs. An important aspect of the book is teaching by example and there are many examples presented throughout the chapters. These examples are supported by a public GitHub repository that provides complete working code as well as sample solutions to the chapter exercises. This helps illustrate how to write well structured, clear, idiomatic Kotlin to build real applications.

Kotlin is the new lovechild of the JVM developers' world.Google promoted Kotlin as a first class language on its Java-based Android platform back in May. Since then, the whole development world has been wondering: what is this language? Kotlin has been around for a few years and has been running on production systems, after the languages 1.0 release in February 2016, for a year or so. The language has received a lot of praise and loving words from the developer community. It is a breath of fresh air, a good upgrade to systems running older versions of Java, and still somehow an old dog in a familiar playing field.What is Kotlin? What does it bring that the JVM doesn't already have?Kotlin vs. JavaThere are a few approaches we can take when introducing Kotlin. We can discuss it through Java, the language Kotlin needs to be based on due to its JVM runtime, or we can do it through Scala, the language Kotlin is heavily influenced by. There is no doubt that Kotlin is better than Java. It is much safer and more concise. It provides you with a bunch of additions to your standard Java language and enhances a few bits and pieces that Java developers have grown to dislike. Additions include things like null safety, extension functions, data classes, objects, first class functions as well as extensive and expressive lambdas. Kotlin also enhances Java's type inference and type system and takes massive leaps forward with collections.Kotlin vs. ScalaPerhaps, it's better to compare Kotlin against Scala. This comparison might scare some of you quite a bit because Scala has the reputation of being simultaneously intriguing and frightening. It heavily introduces functional programming paradigm to you while still mixing it into familiar object orientation (hence in an awfully lot of cases creating a mishmash of advanced techniques from both paradigms), brings in some new build tools, and gives your internal flow state a frustrating break every now and then due to long compile times.I come bearing both good news and bad news. Let's start with the bad news: Bad news is that Kotlin is similar to Scala, it follows the same path as Scala doesThe good news: luckily, it's only slightly similar to Scala in every aspect.Kotlin & Functional Programming ParadigmThe functional programming paradigm is big part of Kotlin as well. Luckily, it doesn't go into the higher-kinded types, monadic do-continuations, or advanced type theory concepts that make you seek out Bartosz Milewski and his brilliant book on Category Theory. Kotlin introduces easy-to-use collection manipulation functions and functional pipelines for you. You will get your maps, filters, and folds, which in most cases are enough to get to the functional programming path.Java devs that have been lucky enough to jump into Java 8 (hugs and kisses to you Android and/or enterprise developers) will be familiar with the these basics and will feel right at home when they jump into Kotlin. They will also find conciseness and safety of better type system, which will spark their first crush towards the language. It is just so pretty and seamless to pipe these functions together and build a clean pipeline. And when you come back to it after a few weeks, you'll still feel like you can somewhat understand it. Smiles all around.

kotlin basicsKotlin is a new open source programming language like Java, JavaScript, etc . It is a highlevel strongly statically typed language that combines functional and technical part in asame place. Currently, Kotlin targets Java and JavaScript. It runs on JVM.Kotlin is influenced by other programming languages such as Java, Scala, Groovy, Gosu, etc . The syntax of Kotlin may not be exactly similar to JAVA, however, internally Kotlin isreliant on the existing Java Class library to produce wonderful results for the programmers .Kotlin provides interoperability, code safety, and clarity to the developers around theworld. StringBuilder sb = new StringBuilder();in Kotlin becomesval sb = StringBuilder()You can see that functions are defined with the fun keyword, and that semicolons are now optional when newlines are present. The val keyword declares a read-only property or local variable. Similarly, the var keyword declares a mutable property or local variable.Nevertheless, Kotlin is strongly typed. The val and var keywords can be used only when the type can be inferred. Otherwise you need to declare the type. Type inference seems to be improving with each release of Kotlin.Have a look at the function declaration near the top of both panes. The return type in Java precedes the prototype, but in Kotlin it succeeds the prototype, demarcated with a colon as in Pascal

Discover How to Build Highly-Resilient, Scalable, and Beautiful Android Apps With the Kotlin Programming Language! Are you looking for the perfect language as a beginner to kickstart your journey into software development? Are you a Java programmer, or any other programmer looking for an efficient way to get started designing awesome Android apps? If your answer is yes, then keep reading... Kotlin is a powerful, general-purpose programming language suitable for cross-platform development. In this comprehensive beginner's guide to Kotlin programming, you'll master the core foundations of Kotlin as well as build your own basic Android app from scratch! Here's what you're going to learn in Kotlin Programming for Beginners Everything you need to know about Kotlin and how it works together with Android How to set up your environment for effective Kotlin application development The core fundamentals of the Kotlin programming language to help you write high-quality code Step-by-step instructions to build your first Kotlin application that runs on Android How to develop aesthetically beautiful and robust layouts using RecyclerView, NavigationView, etc Foolproof ways to test your applications using the available testing frameworks within Kotlin and keep your app free from bugs ...and tons, tons more! Whether you're a brand new software developer looking to pick up your very first language, or you're an experienced Android developer looking to stretch your app to the limits beyond what vanilla Java can offer you, this book is a complete resource guide for everyone looking to master Kotlin and develop awesome apps for Android. Ready to add another programming language to your toolbelt? Scroll to the top of this page and click the "Buy Now with 1-Click" button to get started today!

Kotlin is a statically typed programming language designed to interoperate with Java and fully supported by Google on the Android operating system. It is also a multiplatform language that can be used to write code that can be shared across platforms including macOS, iOS, Windows, and JavaScript. Based on Big Nerd Ranch’s popular Kotlin Essentials course, this guide shows you how to work effectively with Kotlin through hands-on examples and clear explanations of key Kotlin concepts and foundational APIs. Written for Kotlin 1.5, this book will also introduce you to JetBrains’ IntelliJ IDEA development environment. Whether you are an experienced developer or are learning your first programming language – and whether you are interested in Kotlin for Android, server-side, or multiplatform projects – the authors will guide you from first principles to advanced Kotlin usage. By the end of this book, you will be empowered to create reliable, concise applications in Kotlin.

Kotlin Programming For Beginners Take your first step towards a career in android app development with this introduction to kotlin, one of the most in-demand programming language of android. Designed for beginners, this kotlin tutorial book will provide you with a basic foundation in syntax, which is the first step towards becoming a successful android developer. You'll learn how kotlin make decisions and how kotlin keeps track of information through variables and data types. You'll learn to create conditional statements, functions, and loops to process information and solve coding problems. These are fundamental programming skills, and mastering them is a must for all aspiring programmers. What you will learn in this book : -Overview -Basic Syntax -Variables -Control Flow -Operators -Decision making -Class & objects -Inheritance -Access Modifer -Data Classes -Generics -Delegation -Functions -Exception Handling -Much, much more!

"This book is a detailed guide that will help learners get started with Kotlin programming. It talks about the basics and then moves on to practical exercises to help readers quickly gain the required knowledge. This book is meant for both seasoned developers as well as learners without a formal coding background"--

LEARN THE FUNDAMENTALS OF KOTLIN PROGRAMMING TO BUILD APPS Kоtlіn іѕ a cross-platform, statically tуреd, general-purpose programming language with type іnfеrеnсе. Kоtlіn іѕ dеѕіgnеd to іntеrореrаtе fully with Jаvа, аnd the JVM version of Kоtlіn'ѕ standard lіbrаrу depends оn thе Java Clаѕѕ Lіbrаrу, but tуре inference аllоwѕ its syntax to bе mоrе concise. Kоtlіn mainly tаrgеtѕ the JVM, but also соmріlеѕ tо JavaScript (е.g., fоr frоntеnd wеb аррlісаtіоnѕ using React) оr native code (via LLVM); e.g., for nаtіvе iOS apps ѕhаrіng business lоgіс with Andrоіd аррѕ. Lаnguаgе dеvеlорmеnt соѕtѕ аrе borne by JеtBrаіnѕ, whіlе the Kоtlіn Foundation рrоtесtѕ thе Kоtlіn trademark. GЕTTІNG STARTED Bаѕіс Syntax Dеfіnіng расkаgеѕ Pасkаgе ѕресіfісаtіоn should bе at thе top of the source file: package my.demo import java.util.* // ... It is nоt rеԛuіrеd tо mаtсh dіrесtоrіеѕ аnd расkаgеѕ ѕоurсе files саn bе рlасеd аrbіtrаrіlу in thе file ѕуѕtеm. Dеfіnіng functions Funсtіоn hаvіng twо int parameters wіth int rеturn tуре fun sum(a: Int, b: Int): Int { return a + b } Funсtіоn with аn expression body аnd іnfеrrеd return type: fun sum(a: Int, b: Int) = a + b Funсtіоn rеturnіng nо mеаnіngful vаluе fun printSum(a: Int, b: Int): Unit { println("sum of $a and $b is ${a + b}") } rеturn tуре саn bе omitted Ready to start building android Apps? Read "Kotlin Programming for Beginners" now to get started.